Attoampere is 1e-18 ampere units.
Attoamperes to Ronnaamperes Converter — aA to RA
Convert Attoampere (aA) to Ronnaampere (RA) using the exact conversion factor (1 attoampere = 1e-45 ronnaampere). See the formula, worked examples, and conversion table.
Attoamperes to Ronnaamperes converter
Converter
Electricity Converter
Convert electrical units by family and calculate voltage, current, resistance, power, and energy with context values.
Context values
Some unit families need one extra value for a physically accurate result.
Ronnaampere is 1e+27 ampere units.
Result = input x 1e-18 / 1e+27.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Attoamperes to Ronnaamperes
Attoampere and Ronnaampere both belong to the electricity family — voltage, current, resistance, power, or energy — units that show up constantly when working across the different standards used by household wiring (120V/240V depending on region), automotive electrical systems (12V/24V), and electronics design. Specifically: Attoampere is 1e-18 ampere units, and ronnaampere is 1e+27 ampere units.
Formula
ronnaamperes = attoamperes × 1e-45
This factor comes from each unit's defined relationship to the category's base unit: 1 attoampere equals 1e-18 base units, and 1 ronnaampere equals 1e+27 base units, so dividing one by the other gives the direct attoampere-to-ronnaampere factor of 1e-45.
Simple example
1 aA × 1e-45 = 1e-45 RA
1 attoampere = 1e-45 ronnaamperes.
Real-world example
120 aA × 1e-45 = 1.2e-43 RA
120 attoamperes = 1.2e-43 ronnaamperes.
Conversion table
| Attoampere (aA) | Ronnaampere (RA) |
|---|---|
| 1 aA | 1e-45 RA |
| 5 aA | 5e-45 RA |
| 12 aA | 1.2e-44 RA |
| 24 aA | 2.4e-44 RA |
| 120 aA | 1.2e-43 RA |
| 240 aA | 2.4e-43 RA |
Reverse conversion: Ronnaampere to Attoampere
1e-45 RA × 1e+45 = 1 aA
1e-45 ronnaamperes = 1 attoampere.
attoamperes = ronnaamperes × 1e+45
For a page dedicated to this direction, see Ronnaampere to Attoampere.
Understanding the Attoampere (aA)
Attoampere is 1e-18 ampere units.
Understanding the Ronnaampere (RA)
Ronnaampere is 1e+27 ampere units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ronnaamperes are in 1 attoampere?
1 attoampere equals 1e-45 ronnaamperes, using the exact defined conversion factor rather than an estimate.
How do I convert attoampere to ronnaampere?
Multiply the attoampere value by 1e-45. The converter above does this instantly to whatever precision you set.
How do I convert ronnaampere back to attoampere?
Use the reverse factor: 1 ronnaampere equals 1e+45 attoamperes. You can also use the swap control in the converter above to flip the direction instantly.
What is a attoampere?
Attoampere (aA) is a unit of electricity.
What is a ronnaampere?
Ronnaampere (RA) is a unit of electricity.
Is the attoampere to ronnaampere conversion exact?
Yes. Both attoampere and ronnaampere are defined by fixed standards rather than physical artifacts, so the factor of 1e-45 used above is exact to as many digits as you choose to display.
What's the difference between voltage, current, and resistance?
Voltage (volts) is the electrical potential difference driving current through a circuit. Current (amperes) is the rate of flow of electric charge. Resistance (ohms) is how much a component opposes that flow. They're related by Ohm's law (V = I × R), but they are distinct physical quantities, and this page converts between units of just one of them.